Thanks. That’s another thing I wondered about - to what extent do they click/pop under normal conditions.<div><br></div><div> I know it won’t be perfect but the noise is significantly louder than the tones, sounds just this video but on every key <a href="https://youtu.be/NnwJZt3TifI">https://youtu.be/NnwJZt3TifI</a><div><br></div><div>I’ll have time to dig in more tomorrow. </div><div><br></div><div>Nathan</div><br>On Saturday, May 1, 2021, Michael E Caloroso <<a href="mailto:mec.forumreader@gmail.com">mec.forumreader@gmail.com</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I don't think you can eliminate the noise. Vox combo organs are cheap<br>
designs, the contact noise is DC transients when the contacts mate.<br>
In an isolated setting you may notice the contact noise, while in a<br>
band setting it will be masked out by all the other instruments.<br>
<br>
Don't expect these to be high fidelity.<br>
<br>
MC<br>
<br>
On 4/30/21, Nathan Trites <<a href="mailto:nathan@idmclassics.net">nathan@idmclassics.net</a>> wrote:<br>
> Hi all,<br>
><br>
> I've got a continental v301e here where I'm getting a nasty contact noise<br>
> on all keys, which varies in level (seemingly due to where the waveform<br>
> falls). It's definitely not just dirty bus bars & j wires, which have been<br>
> cleaned pretty aggressively. Most of the finger connections seem good, all<br>
> electrolytics replaced, and a few of the (film?) caps replaced for being<br>
> open.<br>
><br>
> With all tone boards in, each bus has an offset of low double digit<br>
> millivolts. With a single tone board in it still occurs with an offset in<br>
> the single digit mV and it still happens. I've replaced coupling caps in a<br>
> few and they still have noise. I can see the spikes on the scope even<br>
> without the preamp board installed. Would such a small offset cause popping<br>
> like that on the switches?<br>
><br>
> The continental is a fair bit older than gear I'm used to working on so I'm<br>
> still getting my bearings on the construction and haven't checked this yet,<br>
> but I suspect the ground from the draw bars or going to the tone boards<br>
> needs to be looked at closer. I do get some very low noise on the power<br>
> supply (even with nothing installed) again in the 10s of mV range p-p.<br>
><br>
> Schematics can be found here:<br>
> <a href="http://www.theamericannight.com/voxproject/project.html" target="_blank">http://www.theamericannight.<wbr>com/voxproject/project.html</a><br>
><br>
> Any guidance or advice would be appreciated! If anyone knows of a good<br>
> transistor organ repair forum or list that would be very helpful too.<br>
><br>
> Thanks,<br>
><br>
> Nathan<br>
><br>
</blockquote></div>